The former Barcelona player scored 12 goals for Chelsea last season, including a hat-trick against Manchester United, but saw his relationship with Jose Mourinho placed in the spotlight when the Portuguese questioned his age in leaked footage from a French television interview.

He could now make his Everton debut against Mourinho and his former team-mates, with the sides due to meet at Goodison Park on Saturday.

Martinez had been on the lookout for experienced options up front, with Arouna Kone's long-term lay-off leaving him short of cover.